HYDRAULIC DRILLING MACHINE

摘要

A hydraulic drilling machine comprises a drilling instrument (1) connected to a hydraulic motor (3), a hydraulic striker (4) connected through a hydraulic distributor (15), to a pressure line (11) and a drain line (21), and a device (16) for forced suction of the liquid from the working chamber of the hydraulic striker (4) during its idle stroke. The device (16) comprises a mixing chamber (17) connected to the drain line of the hydraulic striker, an ejector (18) connected to the drain line of the hydraulic motor (3), and a diffuser (19) which is connected to the drain line (21) and in which is located the nozzle of the ejector (18).